tree 58e1f14c501d25fa1d1df6df45a723d6fd33cd6e
parent 757f4e51b74f7fb19251020e742a78111fdea194
author Ludovic Desroches <ludovic.desroches@atmel.com> 1371112778 +0200
committer Vinod Koul <vinod.koul@intel.com> 1373004653 +0530

ARM: at91: dt: add header to define at_hdmac configuration

DMA-cell content is a concatenation of several values. In order to keep this
stuff human readable, macros are introduced.

The values for the FIFO configuration are not the same as the ones used in the
configuration register in order to keep backward compatibility. Most devices
use the half FIFO configuration but USART ones have to use the ASAP
configuration. This parameter was not initially planed to be into the at91 dma
dt binding. The third cell will be used to store this parameter, it will
become a concatenation of the FIFO configuration and of the peripheral ID. In
order to keep backward compatibility i.e. FIFO configuration is equal to 0, we
have to perform a translation since the value to put in the register to set
half FIFO is 1.

Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>